Apparatus for transferring components of a sealed contact switch to an assembly machine

ABSTRACT

A first transfer apparatus inserts a pair of elongated article components between upper and lower clamping jaws on a workholder mounted on a turret. The workholder is then moved adjacent to a second transfer apparatus which inserts a hollow article component into the workholder and moves the clamping jaws to insert the elongated components into the hollow component to assemble the article.

United States Patent McConnell et al. 1 Sept. 12, 1972 APPARATUS FOR TRANSFERRING [56] References Cited COMPONENTS OF A SEALED CONTACT SWITCH TO AN ASSEMBLY UNYTED STATES PATENTS MACHINE 317,601 5/1885 Welker ..214/l BB Inventors: James C McConnell; Samuel Pin- K856111181] nolis; Wilhelm E. A. Schmidt, all of winstomsajem, Primary ExaminerGerald M. Forlenza Assistant Examiner-George F. Abraham [73] Assignee: Western Electric Company lncorp New York, NY. Attorney H. J. Wmegar et al.

[22] Filed: Jan. 26, 1971 [57] ABSTRACT [21] Appl. No.: 109,882 A first transfer apparatus inserts a pair of elongated article components between upper and lower clamp- Related Apphcauon ing jaws on a workholder mounted on a turret. The [62] Division of Ser. No. 862,541, May 15, 1969, workholder is then moved adjacent to a second Pat. No. 3,583,577, which is a division of Ser. transfer apparatus which inserts a hollow article com- March 1967, ponent into the workholder and moves the clamping jaws to insert the elongated components into the hollow component to assemble the article. [52] US. Cl ..2l4/l BT, 214/85 F [51] Int. Cl ..B65g.59/06 [58] Field of Search ..2l4/1 BB, 1 ET, 1 B, 8.5 F 6 Claims, 16 Drawing Figures PATENTED E Z m2 3690.471

SHEET 01 [1F 10 ATTORNEY PATENTED SEP 12 I972 SHEET EZUF 10 PATENT EDSEP 12 m2 SHEET 03 0F 10 PATENTED E 12 m2 3.690.471 SHEET OSUF 1O PATENTEDSEP 12 I9 131690.471 SHEET D7UF 1O AZi PATENTEUsEmmn 33900471 swam use; 10

PATENTEDSEP 12 I972 SHEET OSUF 1O APPARATUS FOR TRANSFERRING COMPONENTS OF A SEALED CONTACT SWITCH TO AN ASSEMBLY MACHINE CROSS-REFERENCES TO RELATED APPLICATIONS This application is a division of application Ser. No. 862,541, filed May 15, 1969, now US. Pat. No. 3,583,577 issued on June 8, 1971 which is a division of application Ser. No. 620,320, filed Mar. 3, 1967, now US. Pat. No. 3,491,425 issued on Jan. 27, 1970.

In US. Pat. No. 3,539,323 of G. A. Marlin and W.E.A. Schmidt granted Nov. 10, 1970 and entitled Apparatus for Assembling Sealed Contact Switches there appears a detailed disclosure of an assembly fixture used in the fabrication of sealed contact switches. In US. Pat. No. 3,491,900 of S. Pinnolis and W.E.A. Schmidt granted Jan. 27, 1970 and entitled Apparatus for Removing an Article Clamping in a workholder there is described a device for removing complete sealed contact switches from an assembly fixture.

BACKGROUND OF THE INVENTION Sealed contact switches are fabricated by a multiple station assembly machine having a plurality of assembly fixtures. The fixtures receive the components of a sealed contact switch, a glass sleeve, and a pair of contacts having a paddle-shaped portion and a shank portion, from transfer devices positioned at the first two stations of the machine. The sealed contact switch is then assembled by indexing the fixture through various assembly stations at which assembly operations are performed.

In positioning the components of the sealed contact switch in an assembly fixture, it is desirable to locate the components in precisely the same relative positions in order to produce sealed contact switches having uniform characteristics. For this purpose, it is necessary to accurately align a pair of contacts on a transfer device before the transfer device is moved to positively position the contacts in a precise spaced relationship within the assembly fixture. Next, it is necessary to accurately insert a glass sleeve into the assembly fixture in a predetermined position between the contacts whereafter the contacts are moved into an overlapping relationship within the sleeve.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for transferring components of an article to an assembly machine in which the article components are accurately positioned on a movable transfer member before and during movement of the transfer member toward the assembly machine in order to insert the components in predetermined positions in a workholder on the machine.

Another object of the present invention is to provide a transfer apparatus for accurately inserting articles in predetermined positions into movable holding devices of a workholder and for moving the holding devices to predetermined positions on the workholder in order to locate the articles in a precise configuration.

With these and other objects in view, the present invention contemplates facilities for sequentially loading article components in a common. assembly fixture which is subsequently operated to assembly the components. These facilities include a first transfer device located at a first station for transferring a pair of article components into movable holding devices mounted on an assembly fixture of the machines and a second transfer device located at a second station for transferring another article component into a resilient holding device mounted on the fixture. The assembly machine includes an indexible turret having a plurality of as-' sembly fixtures which are advanced to the assembly stations of the machine. After an assembly fixture has received the article components from the first and second stations, the movable holding devices of the fixture are advanced toward the resilient holding device by movable actuator members mounted on the second transfer device to insert the first pair of articles into opposite ends of the second article in an overlapping relationship.

The loading of the first article components into the assembly fixture is accomplished by the first transfer device which includes a transfer member pivotally mounted to a block having a cutout portion for receiving the transfer member. The first pair of article com ponents are directed through passageways formed in the block to a pair of extensions on the transfer member and are held against the transfer member by a vacuum applied through passageways in the extensions. A sliding plate mounted to the block which normally covers a part of the cutout portion and the extensions of the transfer member is moved along the block to uncover the transfer member extensions and the pair of article components hold thereon. When the transfer member is pivoted out of the cutout portion of the block and as it is moved toward an assembly fixture, one of the components is swept over a camming member to accurately-adjust the position of that component on the transfer member in order to locate the article components in predetermined positions in the assembly fixture.

The loading of a hollow component into the assembly fixture is accomplished by the second transfer device which includes a transfer member mounted for reciprocation toward and away from the assembly fixture. A guide member is pivotally mounted adjacent to the transfer member and is urged against its front face. An article component is inserted between the front face of the transfer member and the guide member and then the transfer member is moved toward the fixture. The guide member pivots out of the path of the transfer member and the component is held against the front face of the transfer member by a vacuum applied through passageways in the transfer member. The article component is moved past a camming member which accurately adjusts the position of the component on the transfer member so that it is inserted in the resilient holding device in a predetermined position.

BRIEF DESCRIPTION OF THE DRAWING Other objects and advantages of the present invention will become apparent upon consideration of the following detailed description in conjunction with the accompanying drawing, wherein:

FIG. 1 is a plan view of an apparatus for assembling sealed contact switches having an indexible turret on which are mounted a plurality of assembly fixtures which are moved past a plurality of assembly stations;

FIG. 2 is a perspective view of a transfer device positioned at the first station of the assembly apparatus of FIG. 1 including a pair of actuator members for operating jaw members onan assembly fixture and a sliding plate which normally covers a portion of a pivotal transfer member for inserting a pair of contacts into the assembly fixture; FIG. 3 is a side elevational view, partially cutaway, of the transfer device of FIG. 2, illustrating a block having cutout portions for receiving extensions of the pivotal transfer member and a pair of passageways terminating in the cutout portions for directing a pair of contacts to the extensions of the transfer member;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3 illustrating the transfer member received in a cutout portion of the block and covered by the sliding plate; 1

FIG. 5 is a sectional view taken along line 5--5 of FIG. 3 showing the extensions of the transfer member covered by the sliding plate;

FIG. 6 is a front elevational view of the transfer device illustrating the actuator members for operating the jaw members of an assembly fixture positioned adjacent to the transfer apparatus and a plurality of safety switches;

FIG. 7 is a plan view of the transfer device illustrating an air cylinder for pivoting the transfer member;-

FIG. 8 illustrates a pair of extensions formed on the transfer member having a pair of flat recessed surfaces against which the contacts are held;

FIG. 9 is a schematic diagram of a circuit utilizing a plurality of valves to supply pressurized air to air cylinders which operate the actuator members, the sliding plate, and the pivotal transfer member of the transfer apparatus of FIG. 2;

FIG. 10 is a side elevational view of a transfer device positioned at the second station of the assembly apparatus of FIG. 1 illustrating a slide for transferring a glass sleeve to a resilient holding device on an assembly fixture and a camming member for adjusting the position of the glass sleeve on the slide as it is moved toward the assembly fixture;

FIG. 11 is a front elevational view of the transfer apparatus of FIG. 10 illustrating a pair of movable actuator members mounted to the transfer device and a pair of switches operated by the actuator members;

FIG. 12 is a plan view of the transfer apparatus of FIG. 10;

FIG. 13 is a side view, partially in section, of the transfer member illustrating the operation of the camming member and a pivotal guide member as the transfer member is moved toward the assembly fixture;

FIG; 14 is a perspective view of the transfer member as it advances toward the assembly fixture;

FIG. 15 is a front view of the transfer member with the pivotal guide member removed; and

FIG. 16 is a schematic diagram of a circuit utilizing a plurality of valves to supply pressurized air to air cylinders for operating the actuator members and the transfer memberv of the transfer apparatus of FIG. 10.

DETAILED mzscarprrow Description of the Assembly Machine In FIG. '1 there is shown an apparatus for assembling scaled contact switches having a plurality of stations at which assembly operations are performed. The assembly machine includes a plurality of assembly fixtures 21 which are mounted upon an indexible turret 22. As shown in FIGS. 6 and 10, each assembly fixture 21 includes an upper carriage 24 having a pivotal jaw member 24 and a lower carriage 25 having a pivotal jaw member 25' slidably mounted upon a standard 26. A plate 27 projects from the upper carriage 24 and a plate 28 projects from the lower carriage 25. A glass sleeve holder 29 is mounted on the standard 26 between an upper reflector 23 and a lower reflector 23.

In the operation of the assembly machine, the turret 22 is indexed through a plurality of assembly stations 1-8. At station 1, the carriages 24 and 25 are moved to their extreme upper and lower positions, respectively, on the standard 26 and a transfer mechanism positioned at that station operates to feed an upper contact 30 (FIGS. 8 and 10) to the carriage 24 and a lower contact 31 to the carriage 25. At station 2 another transfer mechanism operates to feed a glass sleeve 32 (FIGS. 10

' and 13) into the holder 29 and the carriages 24 and 25 lower contact 31 and an actuator member 34 opens the jaw member 25 to release the lower contact 31. Then a radiant heater is activated to seal the lower contact 31 within the lower end of the glass sleeve 32. The fixture 21 is then advanced to station 5 at which the upper end of the glass sleeve 32 and the upper contact 30 are preheated by directing radiant energy to the upper reflector 23. After the holder 29 is moved laterally to set a desired gap between the contacts 30 and 31, the fixture 21 is indexed to station 6 where a hood 35 is lowered over the fixture 21 and the upper end of the contact 30 is sealed in the upper end of the glass sleeve 32. Thereafter, the fixture 21 is moved to station 7 where the completed sealed contact switch is allowed to cool. Finally, at station 8 the completed sealed contact switch is removed from the assembly fixture 21.

APPARATUS FOR TRANSFERRING CONTACTS TO AN ASSEMBLY FIXTURE A transfer apparatus is positioned at station 1 of the assembly apparatus of FIG. 1 for transferring contacts to the assembly fixtures 21 of the assembly machine. The transfer apparatus shown in FIGS. 2-5 includes a block 41 mounted to a frame 42. The block 41 has upper and lower cutout portions 43 and 43 (FIG. 3) formed in one of its sides defining a block projection 41 therebetween. A transfer member 44 is mounted to the block-41 for movement ina pivotal path into and away from the cutout portions 43 and 43'. An air cylinder 45 (FIGS. 2 and 7) having a piston rod 50 extending from one end'is mounted to the frame 42. The piston rod 50 is connected by a bracket 55 to the transfer member 44. The transfer member 44 has an upper extension 46 and a lower extension 47 (FIGS. 3 and 8) which are received in the cutout portions 43 and 43', respectively, and can be moved toward an assembly fixture 21 positioned adjacent to the transfer device. The block 41 has a first passageway 48 (FIG. 3) which extends from an upper surface of the block 41 and terminates in an upper surface of the cutout portion 43 above the extension 46 or the transfer member 44. The block 41 also has a second passageway 49 which extends from the upper surface of the block 41 through the block projection 41' and terminates in an upper surface of the cutout portion 43' above the extension 47 of the transfer member 44. As shown in FIGS. 2 and 3, a tube 51 is connected to the passageway 48 and a tube 52 is connected to the passageway 49.

A plate 53 is connected to the block 41 by a plurality of bolts such that an inner surface of the plate 53 covers a portion of the passageways 48 and 49 and forms side walls of the passageways 48 and 49. A plate 54 is slidably connected to the block 41 by a pair of bolts 56 and 57. As shown in FIGS. 4 and 5, an inner surface of the plate 54 normally covers the cutout portions 43 and 43' and is spaced from the extensions 46 and 47 of the transfer member 44 in the pivotal path of the transfer member 44. The plate 54 also covers portions of the passageways 48 and 49. An air cylinder 58 mounted to the frame 42 has a piston rod 59 extending from its front end which is connected to the plate 54 by a link 61. j

The block 41 also has a groove 62 formed therein which cuts across the passageways 48 and 49. An escapement member 63 (FIGS. 3 and 5) is slidably received in the groove 62. The escapement member 63 has a pin 64 which projects outward from the block 41 and is received in a slot 66 formed in the plate 54. The escapement member 63 has a pair of openings therein which are normally in alignment with the passageways 48 and 49 when the plate 54 is positioned to cover the extensions 46 and 47 of the transfer member 44 as shown in FIG. 3. An adjustable stop 67 is mounted on the block projection 41 and projects into the cutout portion 43 beneath the termination of the passageway 48. An adjustable stop 68 is mounted in a slot 69 formed in the block 41 beneath the termination of the passageway 49.

As shown in FIG. 8, the extension 46 of the transfer member 44 has a recessed surface 46' which is spaced from a front side of the transfer member 44 by a distance w. A plurality of holes are formed in the recessed surface 46 which open into a passageway 71 (FIGS. 3 and 5) formed within the transfer member 44 and which has an opening in its front side. Similarly, the extension 47 of the transfer member 44 has a recessed surface 47 formed therein and spaced from the front side of the transfer member 44 by a distance w' which is larger than the distance w. The recessed surface 47 also has a plurality of holes which open into the passageway 71. A flexible hose 72 is connected to the opening of the passageway 71 formed in the front side of the transfer member 44 and is used to apply a vacuum to the passageway 71.

FIG. '2 also illustrates an adjustable camming member 73 which is mounted adjacent to the transfer member 44 by a bracket 74. The camming member 73 has a lower tapered surface 76 (FIG. 3) which is located slightly above the pivotal path extension 47 of the transfer member 44.

As shown in FIGS. 2 and 6, a pair of air cylinders 78 and 79 are angularly positioned on the frame 42 such that the aircylinder 78 points in anupward direction and the air cylinder 79 points in a downward direction. The air cylinder 78 has a piston rod 81 projecting from its front end. An actuator member82 is connected to the piston rod 81. The actuator member 82 is utilized to pivot the jaw member 24' of the upper carriage 24. Similarly, the air cylinder 79 has a piston rod 84 extending from its front end and an actuator member 86 is connected to the piston rod 84. The actuator member 86 is used to operate the jaw member 25' on the carriage 25. A microswitch 87 mounted above the air cylinder 78 on the frame 42 is operated by movement of the actuator member 82. A 'microswitch 88 mounted below the air cylinder 79 on the frame 42 is operated by movement of the actuator member 86.

FIG. 6 also illustrates a switch 89 mounted to the frame 42 and having a plunger 91 which projects through the frame 42 and is operated by the transfer member 44.

CONTROL CIRCUIT FOR TI-IE CONTACT TRANSFER APPARATUS A circuit having aplurality of valves V,V (FIG. 9) is utilized to operate the contact transfer apparatus 'of the present invention. As shown in FIG. 9, a plurality of four-way valvesV -V are connected to a source of pressurized air through a common line 101. The output lines of valve V are connected to flexible hoses 94 and 98 extending from the air cylinder 45 which operates the transfer member 44. The output lines of valve V are connected to flexible hoses 92 and 96 extending from the air cylinder 78 which operates the actuator member 82. A pair of flexible hoses 93 and 97, attached to the air cylinder 79 which operates the actuator member 86, are connected to the output lines of valve V The output lines of valve V, are connected to flexible hoses 91 and 99 of the air cylinder 88 for operating the sliding plate 54. Finally, the flexible hose 72 extending from the transfer member 44 is connected through the valve V to a vacuum source 102.

The operation of valves V,-V is controlled .by a plurality of cams 103-109 mounted upon a shaft which is rotated by a timing motor 110. The motor is connected to a single cycle timing circuit which includes a switch 95 and a solenoid which operates a switch 120. The switch 95 is operated by the indexing mechanism of the turret 22 so that the motor 110 is energized during a dwell portion of the turret cycle. The solenoid 115 also operates an escapement mechanism 90 which limits the rotation of the motor shaft to one revolution. A slip clutch is mounted on the motor shaft to compensate for overrun of the timing motor. The cams 103-109 operate a plurality of switches S -S through which an operating potential is applied to the valves V V by a potential source. The angular positions of the cams 103-109 relative to the motor shaft are adjustable so that any desired sequence of operation of the switches S -S-, can be obtained by setting the cams 103-109 at desired angular positions.

OPERATION OFTHE- CONTACT TRANSFER j APPARATUS r-v In the operation of the transfer apparatus of FIG. 2, after'the turret22 has been indexed to advance an assembly fixture 21 to a'position adjacent to the transfer apparatus a coritact 30 (FIG. 3'). havinga shank portion and a flat, paddle-shaped portion is inserted in the tube SI with its paddle-shaped end down. The contact 30 isdirected by the passageway 48 to a position adjacent to the extension-46 of the transfer member 44 where it rests'upon the stop 67.5 1 At the same time; a'eontact 31 is inserted in the tube V 5 2 withitspaddle shaped portion up. The contact 31 is directed through the passageway49 to a position adjacent to the extension47 of the transfer member 44 where it'rests upon the stop :68. Themcvemen't of the turret 22close'sthe switch 9$'(FlG.' 9) momentarily to energize-the solenoid 115.. The solenoid 115closes the switch 120 and releases the-escapement mechanism 90 so that the motor! 10 rotates its shaft and the cams 103 199 mounted thereon. The cam 103v is arig'ularly positioned on the shaft so that it is first to operate" its associated switchs Upon the closing of switch S the valvevg is operated toiapply a vacuum from the source 102 to 'the flexible hose 72. When the vacuum isapplied to the passageway 71 through the flexible hose 72, the'flat portions of the contacts 30 and 31 are drawn against the recessed surfaces 46' and47'. (FIG.

8) and are held against those surfaces as long as the vacuum is applied to the hose 72. v

Asjthe shaft continues to-rotate, the cam 104 is next to operate its associated switch S, to energize the valve V suchthat pressurized air is applied to the air cylinder 58 through the-air hose 91. The piston rod 59 is drawn into the air cylinder 5 8-to move the plate 54 away-frorn the cutoutportions 43 and 43' of the block 47 moves :past the camrningfmember the paddleshaped end of the contact 31, is bushed' against the camming surface I 76 of the camming member ,73 to move the contact 31-downwardon the recessedsurface 47' to set the contact 31 to a d'esiredrposition on the extension 47.- Then the transfer mernber'l44fi's moved I to its fully pivoted position where the contacts and 31 are moved behindthe jaw members 24 and 25'. f

At this point'the earn 107 operates the switchfS, to

switch the valves V,fand Y, so that pressurized air is applied to the air eylinder's78 and 79'through the flexible hoses 96 and 97 such that the piston rods 81' and 84 are drawn into the air cylinders 78 and 79. This movementv of the piston rods 81and 84' moves the actuator members 82 and 86 out of contact with the jaw members 24. and 25' thereby allowing the jaw Qmembersj24l' and 25 toclampthecontacts30and31."- fl After the contacts 30 and.31are. clamped, the cam 108 closes the switch S; to operate-the valves V and V Thus, the air cylinder 45 is 'operated :by' applying pressurizedairthrough the flexible hose 98 such that the piston rod 50 is driven outward-from the cylinder 45 to move the transfer member .441'aw ay from the assembly fixture21 a'ndinto the cutout portions .43 and 43' of the block 41. At the same time, the valve V is closed so that the vacuum is-no longer applied to. the

41 and out of the pivotal path of the extensions 46 and 47of the transfer member 44'. when thepiston rod59 is completely. drawn into the air cylinder 58, the plate 54 is 'moved asufficient distance to uncover the extensions 46 and 47. which hold the contacts 30 and 31. Movement of the plate 54 also moves the escapemem r member-63 such that the passageways 48 and 49 are 7 82 and 86 into contact with the" jaw members 24' and 25' to pivot the jaw members 24' and 25' into open positions and to move the carriages 24 and 25 against a pair of stops 27 and 28' on the standard 26 to their extreme upper and lower positions, respectively.

As the shaft-continues to rotate, the cam 106is next to operate its associated switch 84 to energize the valve V, such that pressurized air is applied to the air cylinder 45 through the flexible hose 94 to draw the piston rod 50 into the air cylinder 45. The transfer flexible hose 72 and the contacts. 30 and 31 [are released from the transfer member 44. Finally, thecam 109 closes the switch S to operate the valve V The air cylinder 58 is thus operated by applying pressurizedair through the flexible hose 99 such that the piston rod 59 I is moved outward from theair cylinder 58. This movement of the piston rod 59moves the plate 54 to its ini tial position on the block 41 where it covers the extensions 46 and47 of the transfer member44. This movement of the sliding plate 54 also moves the 'escapement member 63 to its initial position within the groove 62'to noid 1'15 and themotor 110'are deenergiied and the loading operation is completed. The iransferapparatus is now prepared to receive a 'new set of contacts 30 and 31 and to loadthe contacts-30 and 31 into another assembly fixture 21 whichis moved to a position adjacent to the transferapparatus. v

It should be noted that the contact transfer'device is provided with a plurality of safety switches as shown in FIG. .6. The switch 87 is operated-by movement of the actuator member 82 such that the switch is closed when the actuator member 82 is in contact with the jaw member 24'. The switch 87 controls a circuit (not shown) which inhibits the turret indexing mechanism from operating when the'actuatormember 82 is in its extended position. Similarly, a switch 88 is operated by movement of the actuator member 86 su'chthat when the actuator member 86 is in contact with the jaw member 25' the turret indexing mechanism cannot-be 1 operated. Finally, the switch 89 is operated-through a member 44is pivoted away from the cutout portions 43 and 43' of the block 41 toward the assembly fixture 21. As the transfer member 44 moves toward the assembly fixture 21, the contacts 30 and 31 are held againstthe recessed surfaces 46 and 47 of the transfer member 44 by the applied vacuum. When the lower extension plunger '91 by movement of the transfer member 44. The switch 89 also controls an inhibit circuit for the turret indexing mechanism such that the turret 22 can- 1 not be indexed until the transfer member 44:is moved into the cutout portions 43 and 43' of the block 41 to move the plunger 91 into the switch 89 Thus, movement of the turret 22 cannot occur before the actuator members 82 and 86 and the transfer member 44 are moved to their initial positions in the transfer device.

APPARATUS FOR TRANSFERRING A GLASS SLEEVE TO AN ASSEMBLY FIXTURE A transfer device is shown in FIG. which is positioned at station 2 of the assembly machine shown in FIG. 1. Referring to FIGS. 10 and 14, the transfer device includes a frame 111 upon which is mounted a stationary guide member 112. A slide 113 is mounted in a dovetail fashion (FIG. to the guide member 112 for movement toward and away from an assembly fixture 21 positioned in front of the transfer device. The slide 113 includes a pair of elongated members 114 and 116 connected together by a bracket 117 (FIG. 14). An air cylinder 118, mounted to the frame 111, has a piston rod 119 extending from one end which is connected to the bracket 117. The air cylinder 118 also has a pair of flexible hoses 121 and 122 connected at its opposite ends for applying pressurized air to the air cylinder 118. A transfer member 123 is mounted to the front end of the slide 113 and has a front face which projects past the front ends of the elongated members 114 and 116. The transfer member 123 has a groove 124 (FIG. 12) formed in its front face for receiving a glass sleeve. The transfer member 123 also has a pair of passageways 125 shown in FIGS. 10 and 13 which extend from the groove 124 to a common passageway 125' which terminates at a top surface of the transfer member 123 and is connected to a flexible hose 126. The flexible hose 126 is connected to a vacuum source 202 (FIG. 16) which is used to apply a suction force to a glass sleeve positioned in the groove 124 in the front face of the transfer member 123.

'- The transfer member 123 has an upper pair of arms 127 (FIG. 14) projecting from opposite sides of the transfer member 123 and extending past its front face. It also has a lower pair of arms 127' projecting from its opposite sides and spaced from the arms 127. The arms 127' also extend past the front face of the transfer member 123.

A guide member 128 is pivotally mounted to the frame 111 adjacent to the front end of the transfer member 123. The guide member 128 is urged against the front face of the transfer member 123 by a torsion spring 129 (FIG. 11). The guide member 128 has a groove 131 (FIGS. 12 and 14) formed in a side of the guide member 128 which is normally adjacent to the front face of the transfer member 123. The groove 131 cooperates with the groove 124 to receive a glass sleeve 32. A stop member 132 (FIG. 10) is mounted to the frame 111 beneath the transfer member 123 and has a projection 132' which extends past the bottom end of the groove 124 and into the groove 131 in the guide member 128. A glass sleeve which is positioned between the grooves 124 and 131 rests upon the projection 132.

As shown in FIGS. 10 and 11, a plate 136 is mounted to the front end of the frame 111. The plate 136 has a cutout portion formed therein to provide an upper extended portion 137 and a lower extended portion 138. The transfer member 123 moves past the plate 136 through its cutout portion toward an assembly fixture 21 positioned in front of the transfer device. An actuator member 139 is slidably mounted to the upper extended portion 137 between a pair of guide members 141. A crank member 142 is pivotally mounted to the plate 136 adjacent to the actuator member 139. The crank member 142 has a central shaft portion 143 which extends through an opening in the plate 136. A first arm 144 extends from the central shaft portion 143 on the same side of the plate 136 as the actuator member 139. The arm 144 has a slot 146 formed therein which receives a pin 147 projecting from the actuator member 139. A second arm 148 extends from the opposite end of the shank portion 143 on the other side of the plate 136 and is connected by a link 149 to a piston rod 151 extending from an air cylinder 152. The air cylinder 152 is mounted to the frame 111 by a bracket 153 and has a pair of flexible hoses 154 and 156 (FIG. 10) extending from its opposite ends. Pressurized air is applied to the air cylinder 152 through the hoses 1154 and 156 to. operate the upper actuator member 139.

A lower actuator member 159 is slidably mounted between a pair of guide members 161 to the lower extended portion 138 of the plate 136. A crank member 162 is pivotally mounted to the'plate 136 adjacent to the actuator member 159. The crank member 162 has a central shaft portion 163 which extends through an opening in the plate 136. A first arm 164 extends from the'central shaft portion 163 on the same ,side of the plate 136 as the actuator member 159. The arm 164 has a slot 166 formed therein which receives a pin 167 projecting from the actuator member 159. A second arm 168 extends from the opposite end of the shaft portion 163 on the opposite side of the plate 136. The arm 168 connected by a link 169 to a piston rod 171 extending from an air, cylinder 172. The air cylinder 172 is mounted to the frame 11 1 by a bracket 173 and has a pair of flexible hoses 174 and 176 extending from its ends. Pressurized air is applied to the air cylinder 172 through the flexible hoses 174 and 176.

As shown in FIGS. 10 and 11, the actuator member 139 has an upper projecting portion 179 extending from its front face toward the assembly fixture 21. Similarly, the actuator member 159 has a lower projecting portion 181 which extends from its front face toward the assembly fixture 21.

A camming member 182 (see FIG. 10) having an inclined surface 183 is mounted to the plate 136 by a bracket 184 such that the camming member 182 is positioned in front of and above the transfer member 123. The camming member 182 is used to adjust the position of the glass sleeve on the front face of the transfer member 123 as the transfer member 123 moves past the camming surface 183.

As shown in FIGS. 10 and 1 1, a first microswitch 186 is mounted to the plate 136 above the actuator member 139. The switch 186 has a plunger 187 which is operated by the actuator member 139 when the actuator member 139 is in its uppermost position on the plate 136. Similarly, a second microswitch 188 is mounted to the frame 111 beneath the lower actuator member 159. The switch 188 has a plunger 189 which is operated by the lower actuator member 159 when the member 159 is in its lowermost position on the plate 136.

Referring to FIG. 10, there is also shown a tube 191 which is mounted to the bracket 184 and terminates above the top surface of the transfer member 123. Glass sleeves are fed one at a time through the tube 191 to the grooved portions of the transfer member 123 and the guide member 128.

Finally, as shown in FIG. 10, a microswitch 193 having a plunger 194 extending from its front end is mounted by a bracket 195 to the frame 111. The plunger 194 is operated by a member 196 which projects from the elongated member 1 14 of the slide 1 13.

CONTROL CIRCUIT FOR THE GLASS SLEEVE TRANSFER APPARATUS A circuit having a plurality of valves V V (FIG. 16) is utilized to operate the glass sleeve transfer apparatus of the present invention. As shown in FIG. 16, a plurality of four-way valves V,-V are connected to a source 200 of pressurized air through a common line 201. The output lines of valve V are connected to the flexible hoses 154 and 156 of the air cylinder 152 which operates the upper actuator member 139. The output lines of valve V-, are connected to the flexible hoses 121 and 122 extending from the air cylinder 118 which operates the slide 113. The flexible hoses 174 and 176, attached to the air cylinder 172 which operates the lower actuator member 159, are connected to the output lines of valve V Finally, the flexible hose 126.extending from the transfer member 123 is connected through the valve V to a vacuum source 202.

The operation of the valves vrvg is controlled by a plurality of cams 203-207 mounted on a shaft 209 which is rotated by a timing motor 210. The motor 210 is connected to a single cycle timing circuit which includes a switch 195 and a solenoid 215 which operates a switch220. The switch 195 is operated by the indexing mechanism of the turret 22 so that the motor 210 is energized during a dwell portion of theturret cycle. The solenoid 215 also 4 operates an escapement mechanism 190 mounted on the shaft 209 to limit the rotation of the shaft 209 to one revolution. A slip clutch 225 is mounted on the shaft 209 to compensate for overrun of the timing motor 210. The cams 203-207 operate a plurality of switches S -S through which an operating potential is applied to the valves V V, by a potential source 212. The angular positions or the cams 203-207 relative to the motor shaft 209 are adjustable so that any desired sequence of operation can be obtained by setting the cams 203-207 of desired angular positions.

OPERATION OF THE GLASS SLEEVE TRANSFER APPARATUS In the operation of the transfer apparatus of FIG. 10, after the turret 22 has been indexed to advance an assembly fixture 21 from station 1 to station 2 of the assembly machine, a glass sleeve 32 is inserted into the tube 191. The glass sleeve 32 is directed by the tube 191 to the space between the groove 124 in the front face of the transfer member 123 and the groove 131 in the guide member 128. When the bottom end of the glass sleeve 32 contacts the projection 132' of the stop 132, the motion of the glass sleeve is stopped and the glass sleeve is brought to a first desired position relative to the front face of the transfer member 123. The

movement of the turret 22 closes the switch 195 (FIG. 16) to operate the solenoid .215 which closes the switch 220 to energize the motor 210. The solenoid 215 also operates the escapement mechanism 190 to release the shaft 209 for rotation. The motor 210 rotates the shaft 209 and the cam 203 is first to operate its associated switch 8,. Upon the closing of switch S,, the valve V, is opened to apply a vacuum from the source 202 to the flexible hose 126; When the vacuum is applied to the passageways through the'hose 126, a suction force is applied to the glass sleeve 32. The suction force draws the glass sleeve 32 into the groove 124 and holds the glass sleeve 32 against the front face of the transfer member 123.

As the shaft 209 continues to rotate, the cam 204 is next to operate its associated switch S, to energize the valve V, such that pressurized air is applied to the air cylinder 1 18 through the flexible hose 121. The piston rod 119 is then drawn into the air cylinder 118 to advance the slide 113 toward an assembly fixture 121 which is positioned adjacent to the transfer apparatus. As the slide 113 begins to advance toward the assembly fixture 21, the lower, arms 127 on the transfer member 123 move into contact with the guide member 128 to pivot the guide member 128 downward out of the path of movement of the transfer member 123, as shown in FIGS. 13 and 14. The lower end of the glass sleeve 32 is moved off the projection 132 of the stop-132 and at this point is held in a suspended position against the front face of the transfermember 123 by the applied vacuum. Further .movement of the slide 113 and the transfer member 123 toward the assembly fixture 21, moves the top end of the glass sleeve 32 against the inclined surface 183 of the camming member 182. As the transfer member 123 moves the glass sleeve 32 along the inclined surface 183, the glass sleeve 32 is moved downward on the front face of the transfer member 123 to a desired position relative to its front face. The position of the glass sleeve 32 on the front face of the transfer member 123 is selected so that when the glass sleeve 32 is inserted into the workholder 29 of the assembly fixture 21 thetop end of the glass sleeve is accurately positioned within the reflector 23 of the assembly fixture 21. v

After the glass sleeve 32 has been moved past the camming member 182, the guide member 128 is completely pivoted out of the path of travel of the transfer member 123. The transfer member 123 continues to advance toward the workholder 29 until the glass sleeve 32 and the front face of the transfer member 123 move into a rectangular opening 29' (FIG. 12) formed in the side of the workholder 29 facing the transfer apparatus. At the same time, the upper projecting arms 127 of the transfer member 123 move between an upper surface of the workholder 29 and the upper reflector 23 of the assembly fixture 21. Also, the lower projecting arms 127' of the transfer member 123 move between a lower surface of the workholder 29 and the lower reflector 23. The front face of the transfer member 123 moves into the opening 29 of the workholder 29 to insert the glass sleeve 32 therein, and the upper and lower pairs of projecting arms span the workholder to guide the glass sleeve 32 to an exact position within the workholder 29. When the transfer member 123 reaches its fully extended position relative to the transfer device, the glass sleeve 32 is moved behind a resiliently biased clamping device mounted within the opening 29'. At this point the glass sleeve 32 is held by the resiliently biased clamping device within the opening 29' in the workholder 29.

Next the cam 205 operates its associated switch S to close the valve V At this point the vacuum is no longer applied to the flexible hose 126 and passageways 125 so that the glass sleeve 32 is released from the groove 124. Shortly thereafter, the cam 206 closes its associated switch S to operate the valve V -V As a result, pressurized air is applied to the air cylinder 118 through the flexible hose 122 to move its piston rod 119 outward to retract the transfer member 123 from the workholder 29. As the transfer member 123 is moved to its original position, the guide member 128 is pivoted back to its original position against the front face of the transfer member 123.

Simultaneously, the air cylinders 152 and 172 are operated by applying pressurized air to the flexible hoses 154 and 134 to move the piston rods 151 and 171 intotheir respective air cylinders. Movement of the piston rod 151 pivots the crank member 142 in a clockwise direction (FIG. 11) to move the actuator member 139 downward between its guide members 141. Movement of the piston rod 171 pivots the crank member 162 in a counterclockwise direction (FIG. 11) to move the actuator member 159 upward between its guide members 151. As shown in FIG. 10 the upper projection 179 of the actuator member 159 moves into contact with a plate 27 projecting from the carriage 24 to move the carriage 24 downward on the assembly fixture 21. Similarly, the projection 181 of the actuator member 159 contacts the plate 28 projecting from the lower jaw carriage to move the carriage 25 upward on the assembly fixture 21. Thus, the carriages 24 and 25 are moved toward the workholder 29 to insert the contacts and 31 into the glass sleeve 32 in an overlapping relationship.

Finally, the cam' 207 operates its associated switch S to operate the valves V and V; such that pressurized air is applied to the air cylinders 152 and 172 through the hoses 156 and 176. The piston rods 151 and 171 are moved outward from the air cylinders 152 and 172 to return the actuator members 139 and 159 to their initial positions on the plate 136. At this point, the escapement mechanism 190 operates to prevent further rotation of the shaft 209. The solenoid 215 and timing motor 210 are deenergized and the loading operation of station 2 is completed.

The amount of overlap is determined by the initial positions of the contacts 30 and 31 in the carriages 24 and 25. These positions are, in turn, determined by the initial positions of the contacts 30 and 31 on the transfer member 44 of the contact transfer device at station 1. Since the contacts 30 and 31 are positioned accurately in the jaw carriages 24 and 25 by the transfer member 44, the overlap obtain when the carriages 24 and 25 are moved toward the workholder 29 by the actuator members 139 and 159 is very accurately determined by the adjustable camming member 73 of the contact transfer device. Also, since the position of the glass sleeve 32 in the workholder 29 is accurately determined by the camming member 182 of the glass sleeve transfer apparatus, the glass sleeve 32 and the FIG. 1 have very accurate and uniform dimensions and characteristics. I

The above-described apparatus is an embodiment of the present invention which illustrates the principles of the invention. It should be noted that the'apparatus is not necessarily limited to the fabrication of sealed contact switches. Modifications in the apparatus and its operating cycle can be made by persons having ordinary skill in the art without departing from the scope of the present invention.

What is claimed is:

1. In an article transfer device:

a first member mounted for reciprocation from an initial position, said member provided with means for holding anarticle against a front face thereof,

a second member pivotally mounted adjacent to the front face of said first member,

means for urging said second member toward the front face of said first member to hold an article therebetween,

means for positioning an article between said second member and the front face of said first member when said first member is located inits initial position, and

means for reciprocating said first member from its initial position to a second position to move the front face of said first member to pivot said second member against said urging means and away from the front face whereafter the article is held against the front face of said first member as it advances past said pivoted second member to transfer the article to the second position.

2. In an article transfer device as set forth inclaim 1 wherein the means for holding an article against the front face of said first member comprises:

said first member having a passageway extending from its front face and terminating at a surface thereof, and

means for applying a vacuum to said passageway to hold the article against the front face of said first member.

3. In an article transfer device as set forth in claim 1 wherein:

said means for holding an article against the front face of said first member includes a groove formed in the front face of said first member, a passageway extending through said member, one end of the passageway terminating at said groove, and means for applying a vacuum to said passageway to hold the article against the front face of said first member; and

said second member has a groove formed in a side portion thereof normally in alignment with the groove in the front face of said first member.

4. In an apparatus for inserting an article into a resilient clamp on a workholder:

a frame,

a slide mounted on said frame for movement toward and away from said workholder,

a transfer member mounted on said slide having an extended end projecting toward the workholder,

said' member having a groove formed in its extended end and a passageway terminating at one end in said groove and at its other end in a surface of said member,

a guide member pivotally mounted on said frame adjacent to the extended end of said transfer member, said guide member having a side normally located in engagement with the extended end of said transfervmember, said side having a groove formed therein normally in alignment with the groove in the extended end of said transfer member,

means for urging said guide member toward the extended end of said transfer member to hold an article between the grooves formed therein,

a stop mounted on said frame and positioned beneath the extended end of said transfer member and projecting past the groove formed in its extended end,

means for inserting an article in the grooved portions of said transfer member and said guide member whereupon the article is supported on said stop,

means for applying a vacuum to said passageway to draw the article into the groove in said transfer member and to hold the article in that groove, and

means for advancing said slide and said transfer member toward the workholder to pivot said guide member away from the extended end of said transfer member and to move the article off said stop whereafter the article is held against the extended end of said transfer member as it advances past said pivoted guide member to insert the article into the resilient clamp of the workholder. 5. In an apparatus for inserting an article into a resilient clamp on a workholder as set forth in claim 4:

a camming member mounted on said frame and positioned to one side of said transfer member between said transfer member and the workholder, and

said camming member having an inclined surface for contacting the'article hold in the groove in said transfer member as said transfer member moves past said camming member toward said workholder to move the article to a desired position on said transfer member.

6. In an apparatus for inserting an article into a workholder having an opening for receiving the article and a resilient device mounted within the opening for clamping the article therein: f

a frame,

a slide removably mounted on said frame,

a transfer member mounted on said slide and projecting toward the workholder, said transfer member having a front face which can be received in the opening in the workholder,

said transfer member having an upper pair of arms projecting from opposite sides of said transfer member and extending past its front face and a lower pair of arms projecting from opposite sides of said transfer member and extending past its front face, said upper and lower pairs of arms spaced apart a sufficient distance for spanning the workholder when said transfer member is moved said iiaiii r mh r a Q'firiviiifi'loow formed in its front face and a passageway extending through said member, one end thereof terminating at said groove and its other end terminating at a surface of said member,

a guide member pivotally mounted on said frame and positioned adjacentto the front face of said transfer member, said guide member having a side normally located in engagement with said projecting arms, said side having a groove formed therein normally in alignment with the groove in the front face of said transfer member,

means for urging said guide member toward said projecting arms of said transfer member,

a stop mounted on said frame and positioned beneath the front face of said transfer member and extending past the groove formed therein,

means for inserting an article between the grooves in said transfer member and said guide member whereupon one end of said article rests on said stop,

means for applying a vacuum to said passageway to draw the article into the groove in said transfer member and to hold the article in the groove, and

means for advancing said slide and said transfer member toward the workholder to pivot said guide member against said urging means away from the front face of said transfer member to move the article off said stop and past said pivoted guide member, whereupon the article and said transfer member are moved into the opening in the workholder while said pairs of arms projecting from said transfer member span the workholder and the article is resiliently clamped in the opening in the workholder. 

1. In an article transfer device: a first member mounted for reciprocation from an initial position, said member provided with means for holding an article against a front face thereof, a second member pivotally mounted adjacent to the front face of said first member, means for urging said second member toward the front face of said first member to hold an article therebetween, means for positioning an article between said second member and the front face of said first member when said first member is located in its initial position, and means for reciprocating said first member from its initial position to a second position to move the front face of said first member to pivot said second member against said urging means and away from the front face whereafter the article is held against the front face of said first member as it advances past said pivoted second member to transfer the article to the second position.
 2. In an article transfer device as set forth in claim 1 wherein the means for holding an article against the front face of said first member comprises: said first member having a passageway extending from its front face and terminating at a surface thereof, and means for applying a vacuum to said passageway to hold the article against the front face of said first member.
 3. In an article transfer device as set forth in claim 1 wherein: said means for holding an article against the front face of said first member includes a groove formed in the front face of said first member, a passageway extending through said member, one end of the passageway terminating at said groove, and means for applying a vacuum to said passageway to hold the article against the front face of said first member; and said second member has a groove formed in a side portion thereof normally in alignment with the groove in the front face of said first member.
 4. In an apparatus for inserting an article into a resilient clamp on a workholder: a frame, a slide mounted on said frame for movement toward and away from said workholder, a transfer member mounted on said slide having an extended end projecting toward the workholder, said member having a groove formed in its extended end and a passageway terminating at one end in said groove and at its other end in a surface of said member, a guide member pivotally mounted on said frame adjacent to the extended end Of said transfer member, said guide member having a side normally located in engagement with the extended end of said transfer member, said side having a groove formed therein normally in alignment with the groove in the extended end of said transfer member, means for urging said guide member toward the extended end of said transfer member to hold an article between the grooves formed therein, a stop mounted on said frame and positioned beneath the extended end of said transfer member and projecting past the groove formed in its extended end, means for inserting an article in the grooved portions of said transfer member and said guide member whereupon the article is supported on said stop, means for applying a vacuum to said passageway to draw the article into the groove in said transfer member and to hold the article in that groove, and means for advancing said slide and said transfer member toward the workholder to pivot said guide member away from the extended end of said transfer member and to move the article off said stop whereafter the article is held against the extended end of said transfer member as it advances past said pivoted guide member to insert the article into the resilient clamp of the workholder.
 5. In an apparatus for inserting an article into a resilient clamp on a workholder as set forth in claim 4: a camming member mounted on said frame and positioned to one side of said transfer member between said transfer member and the workholder, and said camming member having an inclined surface for contacting the article hold in the groove in said transfer member as said transfer member moves past said camming member toward said workholder to move the article to a desired position on said transfer member.
 6. In an apparatus for inserting an article into a workholder having an opening for receiving the article and a resilient device mounted within the opening for clamping the article therein: a frame, a slide removably mounted on said frame, a transfer member mounted on said slide and projecting toward the workholder, said transfer member having a front face which can be received in the opening in the workholder, said transfer member having an upper pair of arms projecting from opposite sides of said transfer member and extending past its front face and a lower pair of arms projecting from opposite sides of said transfer member and extending past its front face, said upper and lower pairs of arms spaced apart a sufficient distance for spanning the workholder when said transfer member is moved into the opening in the workholder, said transfer member also having a groove formed in its front face and a passageway extending through said member, one end thereof terminating at said groove and its other end terminating at a surface of said member, a guide member pivotally mounted on said frame and positioned adjacent to the front face of said transfer member, said guide member having a side normally located in engagement with said projecting arms, said side having a groove formed therein normally in alignment with the groove in the front face of said transfer member, means for urging said guide member toward said projecting arms of said transfer member, a stop mounted on said frame and positioned beneath the front face of said transfer member and extending past the groove formed therein, means for inserting an article between the grooves in said transfer member and said guide member whereupon one end of said article rests on said stop, means for applying a vacuum to said passageway to draw the article into the groove in said transfer member and to hold the article in the groove, and means for advancing said slide and said transfer member toward the workholder to pivot said guide member against said urging means away from the front face of said transfer member to move the article off said stop and past said pivoted guide member, whereupon the article and said transfer member Are moved into the opening in the workholder while said pairs of arms projecting from said transfer member span the workholder and the article is resiliently clamped in the opening in the workholder. 